diff --git a/src/data/memcache.rs b/src/data/memcache.rs
index fb49191..8fd33e4 100644
--- a/src/data/memcache.rs
+++ b/src/data/memcache.rs
@@ -22,17 +22,12 @@ pub trait Indexable<I: HashableId>: Clone + Send {
 
 impl<I: HashableId, T: Indexable<I>> MemCache<I, T> {
     pub fn new() -> MemCache<I, T> {
-        MemCache::with_capacity(unsafe { NonZeroUsize::new_unchecked(256) })
+        MemCache::with_capacity(NonZeroUsize::new(1024).unwrap())
     }
 
     pub fn with_capacity(capacity: NonZeroUsize) -> MemCache<I, T> {
-        let capacity = capacity.get();
-        let mut lines = Vec::with_capacity(capacity);
-        for _ in 0..capacity {
-            lines.push(RwLock::new(None));
-        }
         MemCache {
-            lines,
+            lines: (0..capacity.get()).map(|_| RwLock::new(None)).collect(),
             _phantom: PhantomData,
         }
     }